DIVIDING THE TUNGUSKA SYNECLISE INTO REGIONS BASED ON TOTAL THICKNESS OF TRAP INTRUSIONS IN OIL-AND-GAS-PROMISING STRATA

V. S. Staroseltsev, T. A. Divina, M. I. Muratov, G. F. Popelukha

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

The paper justifies the possibility to predict the total thickness of the Permian-Triassic intrusions in the oil and gas promising strata of the Tunguska syneclise depending on the ratio of tuffaceous and basaltic complexes lying at the surface and forming a plateau-like broken relief of its northern and central parts. For that purpose, the authors have used deep well columns obtained from the area under study, and cross-sections of tuffaceous-effusive complexes studied by structure mapping with barometric levelling in natural outcrops. Revealed based on statistic figures of lineament network interpreted from aerophotographs, the highs were hydrochemically tested in natural water basins and water flows. This allowed the authors to outline buried highs promising for oil and gas, among which a number of promising highs were identified based on geological and geochemical data.

Keywords: correlation of total thicknesses of intrusive and effusive traps, statistic figures of lineament network, oil-and-gas-promising highs.

DOI 10.20403/2078-0575-2017-4-34-39

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